亚洲精品无码少妇30p,久久久久久精品中文字幕,午夜男女爽爽影院a片免费,五月天亚洲综合

Welcome to Fujian Yongjing Technology Co., Ltd. the website!

Contact us

Add: 18#, Xin'An Road, Shaowu City, Fujian, China
International Trade Dept.
Tel: +86-599-6655932/6654968
Fax: +86-599-6654591
Home Trade Dept. 
Tel: +86-599-6654866/6654968
Fax: +86-599-6655755
High-purity Chemicals Dept.
Tel: +86-599-6655536/6654968
Fax: +86-599-6655755


Products

Reagent Ammonium Fluoride

Quality StandardGB/T 1276-1999

Molecular FormulaNH4F                Molecular Weight37.04

Item

Index

G.R.

A.R.

C.P.

Ammonium Fluoride (NH4F) %  ≥

96.0

96.0

95.0

Clarify Degrees Test

qualified

qualified

qualified

Ignition Residue(Express as SO4) %   ≤

0.005

0.02

0.05

Free Acid(Express as NH4HF2) %   ≤

0.2

0.5

1.0

Free Alkali

qualified

qualified

qualified

Chloride(Cl) %   ≤

0.0005

0.005

0.01

Sulfate(Express as SO4) %  ≤

0.005

0.01

0.02

Fluosilicate %  ≤

0.08

0.30

0.60

Fe  %  ≤

0.0005

0.002

0.004

Heavy metal(Express as Pb) %  ≤

0.0005

0.001

0.002

Properties
The product is a white powdery crystal. It can deliquesce easily and dissolve easily in water. It can dissolve in alcohol slightly. It can be resolved when it is affected by the heat or it is in hot water. It can corrode glass. It’s poisonous.
Application
The product can be used for glass frosting or extracting rare elements and used as a preservative or a mordant.
Storage
Moisture-proof and sealed preservation is needed.
Transport
It should be treated as inorganic poisonous goods.
Packing
The product is packed in a 10kg or 20kg polythene plastic bag. Also pack it on consumer requests.

【Back】

Copyright(C)2017,Fujian Yongjing Technology Co., Ltd. All Rights Reserved. Supported by ChemNet ChinaChemNet Toocle Copyright Notice

亚洲精品午夜| 久久久一区二区国产精品| 久久99久久精品免费看| 亚洲av午夜一区二区精品| 苍井空视频免费在线观看| 亚洲色大成网站www永久| 九九热在线观看视频网站| 国产97在线 | 免费| 国产三级aⅴ在在线观看| 免费 无码 国产在现看| 国产精品国精品国产免费| 久久精品国产www456c0m| 亚洲国产打飞机av网站| 青草原在线视频| 小辣椒导航污污午夜福利| 久久久噜噜噜久久久小说| 91偷自国产一区二区三区| 欧美日韩中文字幕第一区| 亚洲国产高清一区二区三区| 九九久久人妻精品一区色| 亚洲一区二区三区av免费| 亚洲女同一区二区中文字幕| 色欲精品久久人妻av中文字幕| 色综合久久一区二区三三| 91麻豆国产综合精品久久| 一区二区三区四区五六区| 香港真做的三级在线播放| 亚洲h在线一区欧美二区| 国产精品毛片久久久影视| 精品亚洲一区二区三区四区| 日韩电影在成人综合在线| 欧洲日本韩国国产在线一区| 国产激情在线播放你懂的| 国产精品99久久久久久a| 欧美成人黑人硬在线观看| 99久久精品99国产精品| 精品久久久久久久十八禁| 韩国女主播福利一区二区| 久久亚洲精精品中文字幕 | 久久av无码精品人妻出轨| 国精产品一区一区三区有|